A 30-second clip of Lady GaGa's long-awaited video for her R. Kelly duet Do What U Want has been leaked online.

The duo released the track in October (13) and performed the saucy rendition of the single during a November (13) appearance on the American Music Awards, where Gaga stunned fans by pretending to give the R&B veteran oral sex as he portrayed the U.S. president.

However, a promo for the song never appeared, and in January (14), the Poker Face hitmaker reached out to fans to apologise for the video delay, insisting she was not completely satisfied with the film because she was only given a week to "plan and execute" her ideas for the shoot.

Now, six months later, footage from the explicit video has surfaced on Tmz.com.

In one clip, Gaga is pictured as a patient, lying naked under a white sheet on a hospital bed, with Kelly posing as her surgeon as he touches her body under the sheet, causing the singer to moan.

Other scenes feature Gaga writhing around topless on the floor with ripped up magazine pages covering the bottom half of her body as she cups her breasts in her hands, while she also lies face down and pretends to hump the ground in another raunchy segment.

Controversial photographer Terry Richardson also makes an appearance in the promo.